Liang Bingliang, Zheng Zhi, Retana Michael, Lu Kevin, Wood Trevor, Ai Yunlong, Zu Xiaotao, Zhou Weilie
Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148, United States of America. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, People's Republic of China.
Nanotechnology. 2019 Jul 19;30(29):295401. doi: 10.1088/1361-6528/ab0620. Epub 2019 Feb 11.
Recently, metal phosphides have attracted considerable attention as promising electrode materials for supercapacitors. In this work, FeP nanotube arrays have been successfully synthesized on carbon cloth using ZnO nanorod arrays as the sacrificial templets, via a phosphidation process. The dimensions of the FeP nanotubes are characterized using SEM and TEM showing the diameter to be approximately 200 nm and with a wall thickness of 50-100 nm. The tubular structure of FeP nanotubes provides a facile ion pathway and reduced inner inactive material, thus they are favorable for supercapacitor applications. As a result, the as-synthesized FeP nanotube arrays deliver an improved specific capacitance of 149.11 F g and a high areal capacitance of 300.1 mF cm at a current density of 1 mA cm. Furthermore, an MnO//FeP solid-state asymmetric supercapacitor was fabricated with a high areal capacitance of 142 mF cm, which indicates the great potential of FeP nanotube arrays to be a high-performing negative electrode material for supercapacitors.
最近，金属磷化物作为超级电容器有前景的电极材料受到了广泛关注。在这项工作中，以ZnO纳米棒阵列作为牺牲模板，通过磷化过程在碳布上成功合成了FeP纳米管阵列。使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）对FeP纳米管的尺寸进行了表征，结果表明其直径约为200 nm，壁厚为50 - 100 nm。FeP纳米管的管状结构提供了便捷的离子通道并减少了内部非活性材料，因此它们有利于超级电容器应用。结果，所合成的FeP纳米管阵列在电流密度为1 mA/cm²时展现出149.11 F/g的提高的比电容和300.1 mF/cm²的高面积电容。此外，制备了一种MnO//FeP固态非对称超级电容器，其面积电容高达142 mF/cm²，这表明FeP纳米管阵列作为超级电容器高性能负极材料具有巨大潜力。
